the plate with 6 holes drilled in them move the engine forward for additional alternator clearance with the fbody accessories. The transmission moves forward easily. The 7 hole setup moves it to the stock location, I believe, but the alternator is sickeningly close to the engine mount cups and bolts. The third setup, I don't believe I've seen anyone use before. I've actually seen guys put multiple hole locations about 1/2 apart in the plates so they can move the engine anywhere they want.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Thank You Again
You are a wealth of info, RedHeartbeat. I appreciate your willingness to share your knowledge with me.
I believe it was you and Nitrous chatting with R604Z6 back in November about some 1-piece motor mounts he was planning to mill from aluminum. Have you heard anything more about that?
Are you aware of anyone making a motor mount that incorporates the plate and the "cup" ears in one piece?
Nope, but I have heard of guys taking the adapter plates made of steel and welding tabs to them. Bolt the engine to the stock transmission, take measurement from the engine mount to the adapter plate, cut material, drill hole, weld plate to new tabs. That lets you put the engine right back where the old one came out from.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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